Oral Chinese Herbal Medicine for Psoriasis Vulgaris With Blood Stasis Syndrome

Inclusion Criteria: 1. Comply with the diagnostic criteria of Western medicine for psoriasis and the diagnostic criteria for TCM syndromes; 2. Skin lesions involve ≤10% BSA (the lesions are mainly located in the trunk and/or limbs, palm/sole, face/scalp, vulva area is not included); 3. Age between 18 and 65 years old; 4. Those who voluntarily participate in the study and sign informed consent. Exclusion Criteria: 1. Patients with erythrodermic, arthritic, pustular or punctate psoriasis; 2. Other active skin diseases may affect the condition assessment; 3. Received research drugs, biological agents and immunosuppressive agents within 1 month; 4. 2 weeks of treatment with topical glucocorticoids, phototherapy, etc.; 5. During severe, uncontrollable local or systemic acute or chronic infections; 6. Patients with severe systemic diseases; or clinical test indicators in one of the following conditions: alanine aminotransferase or aspartate aminotransferase increased by \>1.5 times the upper limit of normal; creatinine increased by 1.5 times the upper limit of normal; blood routine indicators (white blood cell count) Any one of the red blood cell count, hemoglobin amount, and platelet count) is below the lower limit of normal; or other laboratory abnormalities are judged by the investigator to be unsuitable for participation in the trial; 7. A history of malignant tumors and patients with primary or secondary immunodeficiency and hypersensitivity; 8. Such surgery will be required during major surgery or study during 8 weeks; 9. Pregnant or lactating women; 10. A person with a history of alcohol abuse, drug abuse or drug abuse; 11. Have a history of serious mental illness or family history; 12. Other reasons researchers believe that it is inappropriate to participate in this research.